QuEST is an energy efficiency and energy management firm with a data-driven focus on verifying outcomes.

We are a small and growing business made up of engineers and project managers located in Northern and Southern California. Our team includes engineers, program/project managers, and support staff. We have been in business since 2001 and have strong connections in the California energy field that include relationships with major utilities. QuEST was the first to develop a local government partnership with a municipality (the City of Hayward) and played a sustainability advisory role in the early days of Silicon Valley Leadership Council.

We love that we get to protect and sustain our planet for work. We’re proud of the results we achieve for clients and we like to have fun. We believe in supporting the local community by buying local and we support a thriving bike commuting culture. Join us for a Friday morning ride in the East Bay hills!

Meet the Team

Derrick Rebello, PhD., President

Derrick connects people, ideas, utilities and business needs to advance the energy efficiency category. With a PhD in Economics from the University of Washington, Derrick uses his analytical skills everyday to make decisions to grow the firm. He is a firm believer in monetizing energy savings with a focus on ROI. He combines the principles of big data analysis with the potential power of smart phone technology to help building managers work smarter. You can find him on his bike pretty often or trying to find an empty space on the wall for another piece of art.

Irina Krishpinovich, Director of Programs

As the overseer of utility sponsored energy efficiency programs at QuEST, Irina’s skill is managing the details. She has a B.A. in Literature and History from Bryn Mawr and is fluent in three languages. Irina lives by the credo “do no harm” and is passionate about contributing to positive financial and environmental outcomes every day. She does that through a focus on processes to achieve scale with emphasis on how to do more with less. In her free time, Irina reads fiction and enjoys her two four-legged friends.